The experiment of Rutherford Answer these set of questions using sources based on the discovery of the atom. II Explain why: la) A lead shield surrounds the source of alpha particles with a thin slit. lb} The apparatus is set up in a vacuum. lc} Geiger and Marsden had to wait 3!] minutes in the dark before they could take any readings. ld] Draw the paths of these three alpha particles as they would haye approached the gold nucleus in the experiment. le] Using the pathways. explain how Rutherford interpreted the results from Geiger and Marsden's experiments concerning the structure of the atom and explain the limitations of any resultant atomic model